121221312031120 has 160 divisors (see below), whose sum is σ = 337384775135232. Its totient is φ = 39603407771136.

The previous prime is 121221312031003. The next prime is 121221312031139. The reversal of 121221312031120 is 21130213122121.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 121221312031091 and 121221312031100.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14505322 + ... + 21280201.

Almost surely, 2^{121221312031120} is an apocalyptic number.

121221312031120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121221312031120 is an abundant number, since it is smaller than the sum of its proper divisors (216163463104112).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121221312031120 is a wasteful number, since it uses less digits than its factorization.

121221312031120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35785829 (or 35785823 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 121221312031120 its reverse (21130213122121), we get a palindrome (142351525153241).

The spelling of 121221312031120 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, three hundred twelve million, thirty-one thousand, one hundred twenty".